DOE Milestone-Based Fusion Development Program is the U.S. Department of Energy's public-private partnership that pays private 📝fusion companies for hitting negotiated technical milestones on the way to a 📝fusion pilot plant (FPP).
The program inverts the traditional grant: instead of funding proposed work up front, the government negotiates concrete technical milestones with each company, verifies completion independently, and pays only for results — with the company covering the majority of the cost. The model is borrowed deliberately from NASA's Commercial Orbital Transportation Services program, the fixed-milestone partnership that helped commercial spaceflight companies mature cargo and crew transport. Authorized by the Energy Act of 2020, the fusion version announced its first awards in May 2023: $46 million across eight companies — including Focused Energy, Realta Fusion, Thea Energy, Tokamak Energy, Type One Energy, Xcimer Energy, and Zap Energy — spanning tokamaks, stellarators, mirrors, and inertial approaches, each aimed at a pilot-plant design within roughly five to ten years.
The federal dollars are modest by design; the leverage is in validation. DOE's independent confirmation that a milestone was met is a signal private investors can price, and milestone awardees collectively raised more than $350 million in new private funding in the program's first years — several times the federal commitment.